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Safety valve specially for aluminium industry

A safety and aluminum technology, applied in the direction of safety valve, balance valve, valve device, etc., can solve the problems of shortened equipment life, pipeline and equipment scouring and wear, safety valve frequency jump, etc., to ensure safe and reliable operation, improve Action performance, ensuring the effect of normal action

Inactive Publication Date: 2006-10-18
SHANGHAI KAITE VALVE MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the particularity of the medium, during the discharge process of the safety valve of the alumina dissolution system, the discharged gas-liquid two-phase flow with alumina particles is very likely to cause the guiding movement of the safety valve to be stuck, resulting in the failure of the safety valve function
At the same time, the discharged two-phase flow medium expands rapidly on the outlet side of the safety valve, forming a changing back pressure. If this back pressure cannot be eliminated, it will cause frequency jumping and flutter of the safety valve, and the safety valve will fail rapidly.
Due to the alumina particles with extremely high hardness in the medium, it is easy to cause damage to the sealing surface during the opening, discharge and reseating process of the safety valve, which eventually leads to leakage of the safety valve
Because the medium contains alumina particles and ore slurry, the pipelines and equipment in the alumina industry are severely scoured and worn, and the life of the equipment is shortened

Method used

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  • Safety valve specially for aluminium industry
  • Safety valve specially for aluminium industry
  • Safety valve specially for aluminium industry

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Experimental program
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Effect test

Embodiment Construction

[0018] According to the accompanying drawings, the principle of action of the product of the present invention and its structure and characteristics are as follows.

[0019] Principle of action:

[0020] When the protected pressure-bearing system is in normal working condition, the spring force acting on the disc is balanced with the force of the medium and the sealing force between the disc and the valve seat, and the safety valve is in a sealed state. As the system pressure gradually increases, the sealing force between the valve disc and the valve seat decreases accordingly. When the system pressure rises to the specified value, the sealing force between the valve disc and the valve seat decreases to zero, and the valve disc immediately Open, the safety valve begins to discharge the medium. The system pressure continues to rise, and when it reaches a certain value, the disc is raised to the specified height, and the safety valve is fully open. At this time, the safety valv...

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Abstract

The safety valve specially for aluminum industry includes a valve clack, a valve seat and a corrugated pipe assembly. It features the valve clack with elastic chute type upper sealing surface; an inner sealing ring and an elastically supporting outer ring in the sealing surface between the valve seat and the valve clack and with one semi-circular releasing slot in between; and welded high hardness Co-base alloy in the sealing surface between the valve seat and the valve clack. The corrugated pipe assembly has outside protecting sheath, the valve seat is made of F304 stainless steel and high hardness Co-base alloy, and the valve clack is made of 17-4PH precipitation hardening stainless steel. The present invention has improved performance, high alumina grain impact resistance and high sealing performance.

Description

1. Technical field: [0001] The invention relates to a valve, in particular discloses a special safety valve for the aluminum industry, which is applied to the dissolution system equipment for alumina production. 2. Background technology: [0002] The special safety valve for aluminum industry is mainly used in the high-pressure stripper (pressure cooker) and self-evaporator (flash tank) of the dissolution system in alumina production, as a protection device for pressure-bearing equipment such as containers and pipelines of the system. The applicable temperature of the safety valve is less than or equal to 300°C, and it is suitable for mixed media such as steam with particles, water, ore pulp, etc. [0003] The medium conditions in the high-pressure stripper (pressure cooker) and self-evaporator (flash tank) of the alumina dissolution system are very complicated, generally including water, steam, and pulp, etc., and the pulp contains alumina particles and has high hardness. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K17/04
Inventor 赵南平
Owner SHANGHAI KAITE VALVE MFG
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